Saw set



May 22, 1928. 1,670,949

, G. ANDERSON Z za ,4 "Il n, 29

INVENTOR Patented May 22, 1928.v

UNIT-ED STATES e GUSTAN ANDERSON, ory SEATTLE, WASHINGTON.

SAW snr.

Application led April 27, 1926. Serial No.1074,998. i

This invention relates to saW setsv and more particularly to that class of saw sets wherein the saw set itself is grasped by the operator so as to position the device in operative relationl to the saw blade, and a blow struck with a hammer by the operator. The principal object of my invention is to pro.- vide vertically'adjustable, flexible means lfor supporting the tool in a pre-determined position lwith respect to the saw teeth being dealt with so that uniformity in the set of the saw teeth results, an important feature of this phase of the invention being to pr'event injury to the saw teeth points which has heretofore been caused by vibration of the saw blade L'during the setting operation.

A further object is to providek means which cooperate with supporting means,.for varying the angle in the set of the saw teeth so that the teeth may not be subjected to a point beyond the temper of the saw teeth to withstand. This is especially true where highly tempered saws are being dealt with.

A further object is to provide manually controlled mechanism for moving the operating surfaces to and from each other, prior to the striking operation so that the equivalent of a direct hammer blow on the saw teeth results, which, as it will be understood,

is morel effective for the purpose than a clattering blow, as `when. one of theoperating members is normally spaced away from the saw tooth at the time the blow is struck.

A still further object is to simplify the general construction of the device so as to produce a cheaper and more effective tool of this class than those which have heretoforel been known in the art'so far asv I am aware: n'

In the accompanyingv drawings, illustrating my present invention and forming a part of this specification;

Fig. 1 lis a sidevelevationfof the device in operative position and showing a fragment of a saw tooth. n l e Fig. 2 is a detail horizontal sectional view on' the line 2 2 of Fig. 1. f

Fig. 3 is a detail transverse sectional view on the linev3-3 of Fig. 1. l

Fig. 4- is a perspective view plate.

Fig. 5 is a side elevation showing a slight modification.

Referring now more particularly to the drawings, referencenumeral 1 indicates the ,in Figs. 1r and 5.

of the gauge stock or` .handle portion which is preferably of such formation as to conveniently fit in kthe hand of the operator.

n A bracket 2 I prefer to have in an upwardly arched formation, yas shown. 3 indicates ka cut-out portioninthe bracket,vone of whose sides has a slideway 4 in which is placed the stock 1,` as seenin Fig. 3; the lower extremity 5 of the other side of the bracket forms a part of the gauging mechanism presently tobe more fully described. A saw tooth 6 is shown in Figures land 5 in position to be operated upon. A gauge plate'7 having in its outer end a slot 8 and whichI prefer toemploy in the form of a leaf spring, may bev secured either to the stock 1 as shown in Figure 5 or to an overhanging lateral extension 9 of the bracket2 as shown in Figure 1 preferably by means of a screw 10, as seen Another yscrew 11 which passes through a threaded opening in the extension of the bracket may be advanced or withdrawn so as to tension the leaf spring 7 and to cause its free end to either rise or descend. Extending through` apertures 12 in another lateral extension 13 of the bracket and freely4 slidable therethrough, is a plunger 14, the plunger being urged to the right as seen lin Figs. 1 and 5, by means of a helical spring 15.v A lever 16 is pivoted at 17 to the bracket 2 and a screw 18 passes loosely through the lower extremity of the lever 16 and enters the plunger 14 so that that extremity of the lever forms a limit stop for the outward` movement of the plunger 14. Pivoted at 19 to the upper extremity of the lever 16 is a link 20, the opposite end of the link being pivoted at 21'to. the upper extremity of a trigger 22. They trigger is pivoted upon a reduced circularized portion 23 of a4 nut 24 on a threaded bolt 25 which passes through one end of the stock 1 andalso through `an elongated slot or channel 26 in the bracket 2, as best seen in Fig. 3. kIn the slot 26 are two stop-pins or lugs 27 vand 2'i',a aspri gid or integral parts of the stock'1, which are spaced apart to leave room for the bolt 25l therebetween as seen in Fig. 2. Screws 28 and 29 pass through a threaded portion of the bracket 2, so that when the stock 1 is moved in either direction with respect tothe bracket, which of course is allowed, due to theelongated slot 26, until the desired positionis reached, the screws 28 and 29 may be advanced toward the respectivel stop-pins orulugs untilV the latter be iirmlygripped by the'screws and held in a rigid and firm position with respect to the bracket 2, andthereby.x locking ity 5, which forms a part off-the gauging" mechanism, iti-om shitting on the stock through re-action on the bracket when blowsf` y blow on the plungerxis more effectivefton Y the purpose than when normally spaced are beingy struck on the outer endotthe plunger 1l tor setting the saw teeth against the oblique taceloi' the stock 1. 4l0/indicates thel lower extremity vor linger piece ofthe member 22. The inner ond of the stock 1 is provided witlian oblique 'face indicatedat which is hardened to al suitable temper. g

lVhen the stock is adj ustedpas just described, the lnut. 2l may' be tightened'` upon the threaded bolt 2 5'Qas'will be uudeistood.

rThe operation .of the 4device is Vthat the saw blade 6 isV first grasped by the clamping means a' tiling bench, not shown. The' desiredset ornpiteh'` ot the saw 'teeth vbeing first determined by the operator, the stock lis adjusted as already` tully described, and also the gauging end ot the leaf spring 7 is adjusted to a, predetermined level. rlhe device is now placed in position with respect to the. saw teeth as plainly 'shown in Fig. 1 with the tree end of the leai" spring restingupon the point oi the saw tooth, the-cut-out porn tion or lopening 3 and the extension 13y for holding the plunger 14 extending laterally from the bracket 2, forms a view space al?v lowing` the operator full and easy inspeo tion ofthe inner end of the plunger4 and its contact with the saw teeth trom an operation viewpoint. The device is now tilted or canted so that the'ez-:tremity 5 ofthe bracket contacts with the rut portion ot thetooth and the upper extremity 'ot the stock lcon tacts with the approximate upper extremity of the tooth. rlhe operator then movesthe trigger 30 toward him, about its'center of movement 23, which ot course, through the.

link 2O and the lever 16, causes kthe plunger 13 to move toward the saw tooth against the action of its spring 15. The inner' extremity ot' the plunger is now being held'snugly against theside oi the saw tooth and the opposite side ot the tooth snuglyY pressed against the inner end of the stock 1. The operator now strikes a blow uponl the outer end of the plunger 1li: which will forceithe upperend ot the saw tooth in the direction ot'the blow and. cause it to be moved out ot the vertical plane ot the saw blade to an eX- tent equal. to the oblique surface 32 ot the stock 1. Y Y j From the foregoing itfwill be seen that the teeth will Iall have exactly the same set and that the chances oi breakage ot Vthe teeth are reduced to ay minimum. It will also lbe seen that'by adjustment o'tall the parts as Valready described, any set and Tan-= gularity ot the teeth may be attained. It will yalso',further be. seen that little or no vibration oi'tlie saw'tooth being setoceurs during Atl ie, operation, so that the saw teeth may be set without injuring their points.

Iii-reference to' thetrigger mechanism, it

will be understood that with theplunger 14 held snug against a saw tooth, a hammer away from 'thersaw tooth by the retracting spring 15.y The trigger mechanism being connected to the plunger 14; within the hous-4 ing ol' theextension 13 allows the plunger to be moved toward the oblique tace oi'y the stock 1 `independently of vother parts ot' the device and theadjustments thereof., Fur,-

thermore, upon inspection-oi Figures Lando it will b-e seen that the whole trigger mecha-` nism is in the form of an attachment tliatl j may be detached by manipulating thescrew's 4 j 17 and.`18 and the nut 2.4, should there bel any reason for doing s o, andthe main tool still remaining intact with its justed position.'

parts in ad- Fig. `5 showsthe stock 1 pistol i l grip. rIhe leaf spring? is secured Wto the stock 1.` rlhe bolt 25 is reversedend Jfor end,

and the eircularized bearing 23, onvwhichxthe ol the bolt as shown ina dotted lin-e,n 'llhese ,A

vfeatures are all equivalent to those shown in the other gures. i ,n 'lt is to be noted thatheretofore all 'saw are always subject to vibration whenja blow is struck onthe swager or pliingerwoi'` such,

devices.v lVibration inji'ires thie points the saw teeth whena heavy tool likefa sawg set of this type restsupo'n them. In'the present ,instance it will` beseenvinuFig.` 1v that the gauging, or supporting member, rests upon the same saw tooth that is being set, and` urthei-that saw tooth is beinglield f firmly withiiithe set as shown and therefore cannot vibrate when the plunger being,4 struck with a hammer. y I consider this the most important feature, for with moderate"V care a saw may be re-set even atterutlie( teeth have been sharpened without injuring the points of the teeth when such an'operation becomes necessary. j

While I have shown a particular form ot' n embodiment ot my invention,l I am aware that many minor changes therein will readily suggest themselves to others skilled in the art without departing from the spirit,l i I therefore' and the scope ot my invention. n n desire to avoid being limited tothe Iexact o5 n i l n a l l* l trigger 22 is pivotedis` toriiied on the head vform ot embodiment which I have herein shown and described.

Having described my invention what I claim as new and desire to protect by Letters Patent is l. A sawset comprising a handle having an oblique end face, a substantially U-shaped bracket member thereon so mounted as to be adjustable longitudinally in respect to the handle, a spring-held plunger obliquely mounted in the outer leg of said bracket so as to be substantially perpendicular to rthe oblique end iace o the stock and extendible thereto, a spring gage between the lugs of the bracket so mounted as to limit the entrance ci' the saw blade and a trigger-actuated compound lever adapta-ble to bring the plunger into contact with the saw tooth, in which the trigger is fastened to a side of the handle oppositely where the bracket is fast thereto, said trigger being tiltable about the fastening means having a spur on its upper end, a link tiltably connected to the spur, one end of a lever fulcrumed about a point over the plunger and on the bracket, one

end of said lever being connected to the link n and the other end to the plunger.

2. In a saw set a shank, an inverted U- shaped bracket formed with al pair of transversely extending guide iianges upon one leg and slidably embracing the shank, to permit the bracket to be adjusted longitudinally thcreot, means for holding the bracket in adjusted position on the shank, a saw tooth setting anvil disposed between the legs ot the bracket, al resiliently urged plunger slidably supported by the other leg in a position where its inner end is opposed to the anvil and normally urged away from the latter, a lever pivotally supported upon one leg of the bracket adjacent the plunger and having one end operatively connected therewith, an actuating lever pivoted intermediate its ends to the shank, and a link operatively connecting the two levers together whereby upon rocking of the operating lever in one direction the plunger Will be shifted .into

engagementwith a saw tooth disposed against the anvil. j

A saw set ot' the class described, a stock having an oblique tace at one end thereo, a bracket slidably mounted on the side of the stock and having a cutaway portion opposite to which said one end ot' the stock extends, a lateral extension on said bracket in iront ot said one end of the stock for housing a plunger adapted to coact` with the oblique face on the stock, a saw-engaging` jaw on said extension beneath said housing, means for adjusting and locking the adjustment of the bracket on the stock to vary the space between said saw-engagingk jaw on the bracket and said one end of the stock, and means extending transversely through the stock and a portion of the brackettor securing the bracket to the stock in a pre-adjusted and locked position.

4. A saw set ot the class described, a stock having an oblique Working face at one end thereof, a bracket slidably mounted on one side of the stock and having a cutaway portion opposite to which said one end of the stock extends, a lateral extension on said bracket in front of said one end ofthe stock and a plunger housed in said extension adapted to coact with'the oblique face on the stock,.a saw-engaging jaw on said exten-y sion beneath said plunger, means for adjust-` ing and locking the adjustment of the bracket on the stock, means for securing the bracket to the stock in a pre-adjusted and locked position, `and means under control of the operator to move said plunger toward and away from the oblique liacefolt' the stock and to hold the plunger in such position independently of the pre-adjusted. and locked position of the bracket and its saw-engaging jaw.

5. A saw set of the class described, a stock havingy an oblique working face at one end thereof, a bracket slidably mounted on one side of the stock and having a cutaway portion opposite to which said one end of the stock extends, ya. lateral extension on said bracket in 'front of saidone end of the stock and a plunger housed in said extension adapted to coact with the oblique face on the stock, a saw-engaging jaw on said extension beneath said plunger, means for adjusting and locking the adjustment of the bracket on the stocln means for securing the bracket to the stock in apre-adjusted and locked position, and a trigger mechanism under control of the operator to move said plunger toward and away from the oblique :tace ot' the stock i vsaw-engaging jaw on said extension beneath said plunger, means for adjusting and locking the adjustment of the bracket on the stock, mea-ns for securing the bracket to the stock in a pre-adjusted and locked position, and a trigger control of the operator to move the plunger individually toward the oblique face on the stock and grasp a saw tooth therebetween, whereby a. blow on `the plunger sets the tooth at a predetermined angle.

GUSTAF ANDERSON. 

